PmWiki runs this site, and I love the flexibility of this wiki platform. Though I don't use it as collaborative wiki, I find it much quicker and easier to enter, add, and change content using a PmWiki than with conventional blog or CMS systems I've tried (and I've tried quite a few).

Below are some tips, recipes, etc. that I found useful for my PmWiki install.

PmWiki Skins Gallery. Contains scaled screenshots of the available skins for PmWiki. Clicking on a screenshot will take you to the page for that particular skin allowing you to see it in action. Be neat if this is maintained.